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Synthesis of Bi-Sb-Te thermoelectric material by the plasma arc discharge process

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Abstract

The present study focused on the synthesis of Bi-Sb-Te-based ultrafine powder by way of the plasma arc discharge process. The DC arc current of the plasma arc was changed. The chemical composition, phase structure, and particle size of the synthesized powders were analyzed using XRF, XRD, XPS and FE-SEM. The synthesized powders were sintered by the spark plasma sintering method. The thermoelectric property of the sintered body was evaluated by measuring the electrical resistivity, Seebeck coefficient, and thermal conductivity. The synthesized Bi-Sb-Te-based powders had chemical compositions that differed from the raw material, Bi10Sb30Te60. The chemical compositions of the synthesized Bi-Sb-Te-based powders approached the raw material as the DC arc current increased. The synthesized Bi12Sb28Te60 powder had a mixed phase structure of the Bi0.5Sb1.5Te3, Bi2Te3, Sb2Te3, and Te phases. The particle size of the powder was less than 500 nm. The sintered body of the Bi12Sb28Te60 ultrafine powder synthesized by way of the plasma arc discharge process showed p-type thermoelectric characteristics.

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Authors and Affiliations

  1. Division of Materials Science & Engineering, Pukyong National University, Yongdang-dong, Nam-gu, Busan, 608-739, Korea

    Gil-Geun Lee & Dong-Youl Lee

  2. Division of Powder Materials, Korea Institute of Materials Science, 531 Changwondaero, Changwon-si, Gyeongnam, 641-831, Korea

    Gook-Hyun Ha

Authors
  1. Gil-Geun Lee
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  2. Dong-Youl Lee
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  3. Gook-Hyun Ha
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Correspondence to Gil-Geun Lee.

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Lee, GG., Lee, DY. & Ha, GH. Synthesis of Bi-Sb-Te thermoelectric material by the plasma arc discharge process. Met. Mater. Int. 17, 245–250 (2011). https://doi.org/10.1007/s12540-011-0410-y

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  • DOI: https://doi.org/10.1007/s12540-011-0410-y

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